[sca-assembly] Issue 33: Resolution Proposal

Dear SCA-Assembly TC Members,

a resolution proposal for Issue 33 (Long-Running Request-Response
Operations) is attached as "2008-11-12 - SCA-Assembly Issue 33 -
Proposal.doc". It defines the term "long-running" for a WSDL 1.1
request-response operation. Furthermore, it refers to a new
"sca:asyncInvocation" intent, which indicates that clients are strongly
encouraged to call this operation using an asynchronous interface. Finally,
a short example shows what the generated Java interfaces look like.

In a second attachment "2008-11-12 - SCA-Assembly Issue 33 - Java
Mapping.doc", we show the Java mapping which may be considered by the SCA-J
TC. For this issue, it serves as a "proof of concept" for three different
client interaction styles:
   (1) the recommended client interaction using an async handler which
follows the concepts of JAX-WS 2.0, and also defines the interface for
long-running interruptible service implementations
   (2) the alternative polling-style client interaction using an interface
that is implemented by a generated interceptor
   (3) the alternative synchronous client interaction using the standard
(WSDL2Java) interface that is also implemented by a generated interceptor
Both interceptors in (2) and (3) call the service using an async handler,
so the service implementation is not aware of the different client
interaction styles.

The third attachment "2008-11-12 - SCA-Assembly Issue 33 - Long-Running
Request-Response Operations.ppt" illustrates the above concept - it is
mainly what we walked through at the Boston F2F meeting, but now also
covers synchronous callers (addressing a concern raised my Mike Edwards).

(See attached file: 2008-11-12 - SCA-Assembly Issue 33 - Proposal.doc)(See
attached file: 2008-11-12 - SCA-Assembly Issue 33 - Java Mapping.doc)(See
attached file: 2008-11-12 - SCA-Assembly Issue 33 - Long-Running
Request-Response Operations.ppt)

Kind Regards

Dieter König

Senior Technical Staff Member, WebSphere Process Server Architect
IBM Software Group, Application and Integration Middleware Software
WSS Business Process Solutions
                                                                       
                                                                       
                                                                       
                                                                       
                                                                       
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